So what exactly is the genesis of this income that's to be doled out? Is it still wealth redistribution underneath where productive individuals make it possible

So what exactly is the genesis of this income that's to be doled out? Is it still wealth redistribution underneath where productive individuals make it possible for others to live off whatever largesse they create and without those individuals no one has anything to be circulated? Where does it all begin precisely? Is UBI predicated on anything exactly? Can it be employed in Mexico or Cuba or Libya the same effect as it would in Japan or Australia? Can everyone stop working or would there still be a requirement that some percentage of the population work or is there a premise that some fuzzy unquantified percentage of the population would always chose to work regardless of it being mandated or optional.